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To all whom lit ma/y concern.-

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l tant @aient-@fina BENJAMIN D. KAY AND HENRY E'KAY, V0E EALL RIVER, MASSA CHUsETTs..

Letters Patent No. 83,859, dated November 10, 1868.

ADJUSTABLE Box roRARBoR, am.

The Schedule referred to in these Letters Patent and making part ofthe same.

-Beit known that we, BENJAMIN D. KAY and HENRY E.' KAY, of Fall River, in the county of Bristol, in the State of Massachusetts, have invented certain new and useful Improvements in Adj ustable Boxes for Arbors,

, &c.`; and we do hereby declare that the followingis a full and exact description thereofl Our box is provided with adjustable brasses, hinged to the casing, so that they .cannot become permanently displaced or disarranged.

We will irst proceed to describe what we consider the best means of can'yingout our invention, and will afterwards designate the points which we believe to be new.

The accompanying drawings form a part of this speeif eation.

Figure 1 is a central longitudinal section, and Figure 2 is a crosssection. Similar letters of reference indicate like parts in all the figures.

, A is a ease or shell, of cast-iron. M is a shaft or arbor, which it is important to run very accurate] yin the centre thereof,.it being understood that the tension of the driving-belt, the strain of gear-wheels, or the resistance of the work which is being peribrmed, may tend to move the arbor to one s ide, and thus to wear.

ljoints or hinges', b2, thus forming a hinge-connection between the several brasses Bl B2 Ba and the rigid Adjusting-screws, D D2 D3, are tapped through the casing A, Aat or near the centre,- and vadapted to press at or near the centre of the corresponding brasses.

The adapting of the brasses to receive the required I size of shaft or arbor will be readily understood. Wlfen,

by use, the axis of the arbor'M deviates from the centre of the casing A, it can be instantly readjusted by turning the proper screws, D D2, 85e. The hinges which connect the brasses to the box allow the turning which'is necessary, and theseveral brasses are moved up7 either uniformly, or at the proper varyingv rate, as use gradually consumes and wears away the inner surfaces. brasses may be exchanged, and the whole readiusted, as will be obvious.

One advantage of our improvement lies in the abl solute rigidity with which we can hold the several brasses, after the proper adjustment has been attained, by simply tightening the hinge-bearings C. This makes the whole box as if `formed in one piece, without any tremulous or rattling motion.

Another advantage lies in the certainty that the brasses cannot become stuck by friction, or become foul from any cause, and cannot be seriously misplaced, or lost in transportation Our improvement is more particularly designed for lathes for manufacturing spools, and analogous work, where it is important to hold the arbor exactly in the centre of the box in which the cutter iscarried, and where a considerable side strain, due to the drivingbelt, tends to wear the box always to one side, but it may obviously' be applied in a great variety of machinery.

By using a wick, the box is easily made self-lubricating. y

Having now fully describedl our invention,

What we claim as new, and desire to 'secure by Letters Patent, is-l The brasses B B', &e., hinged in the casing A, and arranged relatively tothe arbor M, the hinge-screws C, and adjusting-screws Dl D2, or their equivalents, substantially as and for'the purposes herein set forth.

BENJAMIN D. KAY. HENRY E. KAY. Witnesses:

J emr D. MAsoN, B. F. WmsLow'.

When they are suiiciently worn down, the 

